we problewmsd

I don't know what i have wrote. the title  like that because my keyboard is going crazy lately. when i tap "e" there will type "we" , when i type "s" there will type "sd" also for "c" when i want to type "cat" that will become "cxat". i hate my keyboard like this. because i have to delete the "ghost" letters one by one. i want to buy the new one but i don't have money. so before my money enough to buy it will hard for me to write my essay and diary with this kind of keyboard.
is there anyone who can solve it??